FALLON NAVAL AIR STATION, Nev.—An ex-Los Angeles police officer believed to be responsible for killing three people in Southern California was Naval Reserve unit commander for eight months in 2009 at a northern Nevada air base.

Fallon Naval Air Station spokesman Zip Upham said Thursday that Christopher Dorner was a reserve lieutenant in a unit augmenting security on the base about 70 miles east of Reno, and at a reserve center at Stead Airport north of Reno.

Upham says he doesn't recall ever meeting Dorner.

Upham says that after November 2009, Dorner was assigned to a volunteer training unit at a Naval Reserve center in Los Angeles.

Dorner is suspected in the weekend slayings of two people in Orange County, Calif., and the shooting death early Thursday of a police officer in Riverside.

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